CD8 T cell response and evolutionary pressure to HIV-1 cryptic epitopes derived from antisense transcription. by Bansal, A, Carlson, J, Yan, J, Akinsiku, O, Schaefer, M, Sabbaj, S, Bet, A, Levy, D, Heath, S, Tang, J, Kaslow, R, Walker, B, Ndung'u, T, Goulder, P, Heckerman, D, Hunter, E, Goepfert, P